Knudsen, L2; Hansen, Helle Puggård4; Baskarada, D2; Nedergaard, N2; Pedersen, R B2; Vink, L G2; Moeslund, T B2; Lassen, Lone4
1 Ergoterapi- og Fysioterapiafdelingen, Aalborg Sygehus, Faculty of Health Sciences, Aarhus University, Aarhus University2 Aalborg Universitet3 Department of Clinical Medicine, Health, Aarhus University4 Department of Clinical Medicine, Health, Aarhus University
Background Mirror Visual Feedback (MVF) is an important part of therapeutic treatment of Complex Regional Pain Syndrome (CRPS). Unfortunately mirror boxes (MB) are not compatible with meaningful activities. Recently it was shown that Virtual Reality (VR) as MVF treatment makes this possible. This work examines Augmented Reality (AR) as MVF treatment. Materials and Methods An AR setup was built for CPRS patients with left arms as affected extremities. The AR displays a virtual left arm, which mirrors the movements of the right arm, on images of the real world. To explore motivational benefits a game was also implemented. Ten healthy subjects participated in cross tests to compare AR, MB and VR. Interviews were used to examine the subjects' experiences and opinions. Results A convincing mirror illusion was present in the AR setup. AR provided a better illusion than VR. The game diminished the illusion but improved motivation. Every participant preferred AR over both MB and VR. Discussion The results of this work indicate that AR might be a better approach for MVF than VR and MB. Further studies are needed before AR can be applied as a treatment for CRPS patients.